Sandal sole



FIG. 1 is a perspective view of a sandal sole, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left end elevational view thereof;

FIG. 4 is a right end elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a rear elevational view thereof;

FIG. 8 is another perspective view thereof, in which the broken line showing of environment is for illustrative purposes only and forms no part of claimed design; and,

FIG. 9 is a bottom perspective view thereof. 

The ornamental design for a sandal sole, as shown and as described. 